CN104944488B - 一种追日太阳能烟囱盐、水、电联产系统及其运行方法 - Google Patents
一种追日太阳能烟囱盐、水、电联产系统及其运行方法 Download PDFInfo
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Abstract
本发明公开了一种追日太阳能烟囱盐、水、电联产系统及其运行方法,其特征是,包括集热棚、设置在所述集热棚中心的太阳能烟囱和设置在所述集热棚与烟囱结合处的风力发电机;所述集热棚边缘设置有若干个定日镜。本发明所达到的有益效果:具有太阳能烟囱和太阳能塔的双重优势,存在聚光和非聚光两种耦合利用太阳能的方式,能够有效降低集热棚面积和烟囱高度,充分回收多种型式的能量,提供了系统的热效率。
Description
技术领域
本发明涉及一种追日太阳能烟囱盐、水、电联产系统及其运行方法,属于能源优化利用技术领域。
背景技术
我国是海洋大国,海岸线漫长,可利用太阳能进行海水淡化。现有太阳能海水淡化技术主要有两种方式:一是利用太阳能发电以驱动反渗透过程;二是利用太阳能产生热能来蒸馏海水使其相变蒸发。太阳能反渗透法需要高压泵、反渗透膜、换热器、冷凝器等部件,因而系统复杂,初投资成本较高。而太阳能蒸馏法简单、应用广泛、技术成熟,且无需额外电能的输入。因此,利用太阳能进行热法海水淡化是一种节能、环保和低投入的海水淡化方式。考虑到太阳能的不稳定性、周期性、低能流密度的特性,对于热法太阳能海水淡化一般需要进行聚光。塔式太阳能聚光是一种规模化和成熟的太阳能聚光装置,利用塔式太阳能聚光进行海水淡化已有相关专利的报道。申请日为2011年8月22日,申请号为201110241159.9的发明专利利用塔式太阳能聚光装置加热传热工质,而后将热量传递给海水从而产生蒸汽。申请日为2013年6月21日,申请号为201310247198.9的发明专利在阳光收集塔塔顶内部铺设储能罐,通过该储能装置将能量分配给海水淡化、制盐厂或发电设备。现有发明专利大多利用蓄积的高温热能间接加热海水产生水蒸气从而淡化获得淡水或浓缩获得海盐,这种方式的系统存在多个换热设备,影响了系统的热效率。同时,此种类型的系统需要蓄积大量的热能,因而需要布置大规模的境场且对每一个定日镜均需要严格控制。
发明内容
为解决现有技术的不足,本发明的目的在于提供一种追日太阳能烟囱盐、水、电联产系统及其运行方法,充分利用本装置内存在的聚光和非聚光形式的太阳能。
为了实现上述目标,本发明采用如下的技术方案:
一种追日太阳能烟囱盐、水、电联产系统,其特征是,包括集热棚、设置在所述集热棚中心的太阳能烟囱和设置在所述集热棚与烟囱结合处的风力发电机;所述集热棚边缘设置有若干个定日镜;所述集热棚包括集热棚盖板、集热棚支撑、蓄热层和盐水池;所述烟囱内从上而下依次设置有冷凝器、淡水收集器、腔体式吸热器和风力透平;所述腔体式吸热器内设置有导热盘管。
前述的一种追日太阳能烟囱盐、水、电联产系统,其特征是,所述集热棚支撑用于支撑集热棚盖板的重量;所述集热棚盖板与蓄热层、盐水池之间形成空气流道;所述集热棚两侧设置有空气入口。
前述的一种追日太阳能烟囱盐、水、电联产系统,其特征是,所述冷凝器的分布形式采用中心高周边低,以利于淡水从边缘流入淡水收集器内;所述导热盘管连接有输水管;所述输水管与盐水池相连接;所述导热盘管内流有蓄热池内的盐水。
前述的一种追日太阳能烟囱盐、水、电联产系统,其特征是,所述定日镜采用两维跟踪太阳方式,每一面定日镜镜面的倾角均不相同;所有的所述定日镜组成境场将太阳光线汇聚到所述腔体式吸热器中;所述聚光区域为设置在烟囱侧面开口内的内腔式吸热器。
一种利用权利要求1至4任意一项所述的追日太阳能烟囱盐、水、电联产系统的追日太阳能烟囱盐、水、电联产系统运行方法,其特征是,空气由所述集热棚两端的空气入口进入系统后流过蓄热层、盐水池、风力透平、腔体式吸热器、淡水收集器后在冷凝器处凝结为淡水,淡水由淡水收集器收集。
前述的一种追日太阳能烟囱盐、水、电联产系统运行方法,其特征是,所述定日镜将太阳光聚集到腔体式吸热器内,加热空气流以及导热盘管内的盐水;所述导热盘管内的工质通过输水管流动到盐水池内加热空气和盐水池内的盐水,而后通过输水管回到导热盘管内,以此循环。
前述的一种追日太阳能烟囱盐、水、电联产系统运行方法,其特征是,空气流推动所述风力透平发电,发出电能经过逆变器后储存在蓄电池内,所述蓄电池内的电源用于驱动导热盘管内的工质做功,富余电能存储在蓄电池内留作无太阳时候使用。
本发明所达到的有益效果:本系统具有太阳能烟囱和太阳能塔的双重优势,存在聚光和非聚光两种耦合利用太阳能的方式,能够有效降低集热棚面积和烟囱高度,充分回收多种型式的能量,提供了系统的热效率。采用非聚光型式的太阳能热气流系统、定日镜聚光系统和增湿-除湿海水淡化系统,三个系统合理组合,充分利用了太阳能的热量,利用太阳能热气流系统产生电能和强大上升气流蒸发盐水池内的海水,利用定日镜聚光系统在烟囱内进一步加热空气同时将部分热量导入盐水池提高盐水温度从而增强蒸发,利用增湿-除湿的海水淡化方案进行海水淡化。采用的定日镜聚光系统使得集热棚半径不会过大,烟囱高度也不会过高,从而提高了系统的可靠性和安全性。
附图说明
图1是本发明的结构示意图。
图中附图标记的含义:
1-烟囱,2-冷凝器,3-淡水收集器,4-腔体式吸热器,5-导热盘管,6-输水管,7-集热棚支撑,8-盐水池,9-空气流道,10-集热棚蓄热层,11-非聚光复合模式集热棚入口,12-风力透平,13-集热棚盖板,14-聚光-非聚光模式集热棚空气入口,15-太阳光线,16-定日镜镜面,17-定日镜两维跟踪轴。
具体实施方式
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
本发明涉及的一种追日太阳能烟囱1盐、水、电联产系统,工作原理详细分析如下:
由定日镜将太阳光聚集在腔体式吸热器4,腔体式吸热器4内部温度升高,该位置内部空气由于温度升高密度降低,由于烟囱1效应开始上浮,空气由非聚光复合模式集热棚入口11和聚光-非聚光模式集热棚空气入口14进入系统。空气沿如图箭头所指方向流动时,在集热棚与烟囱1结合处经过风力透平12,带动风力透平12旋转,从而发出电量。
与此同时空气掠过盐水池8的上表面,促进盐水池8中水分蒸发,蒸发出来的水蒸气随着空气往烟囱1上方流动,流经冷凝器2时空气中携带的水蒸气遇冷凝结成蒸馏水,蒸馏水流下至淡水收集器3中进行收集。冷凝器2中的流动工质采用从外部用泵导入的冷盐水,与流经它的含有水蒸气的空气发生换热,在冷凝水蒸气的同时也使得冷凝器2中的盐水被预热,温度升高,再将在被预热的盐水导入至蓄盐水池8中,继续进行蒸发。
导热盘管5位于腔体式吸热器4内,导热盘管5连接盐水池8,并对盐水进行加热,从而提高盐水池8的温度,增强盐水池8的蒸发。整个系统白天接受太阳辐射进行工作,夜晚停止工作。利用大部分盐在温度降低的情况下溶解度也降低的特点,利用昼夜温差,在温度较低的夜晚进行盐的采集工作,从而获得较多的盐。在阳光较强烈的时间段,可降低系统运行成本,将定日镜水平布置从而作为集热棚的外延,增大集热棚面积,使系统运行在非聚光模式下。
其具体工作过程如下:
在太阳辐射强烈的白天,空气在集热棚盖板13与蓄热层形成的腔道内受热膨胀、温度升高、密度降低,从而形成了与周围环境的密度差,具有向上流动的趋势。
同时,在烟囱1内太阳光通过定日镜加热腔体式吸热器4内的导热盘管5及腔体式吸热器4腔道内的空气,使得烟囱1内空气温度升高、密度降低,具有向上流动的趋势。在这两者作用下,空气从集热棚入口进入系统,从烟囱1出口流出系统,形成了空气流动循环。
空气流经集热棚时,通过盐水池8上方,由于空气温度高、湿度低、与盐水池8表面空气有湿度差,从而促进盐水池8内盐水的蒸发,空气湿度大量增大。
集热棚所收集到的气流在烟囱1内汇集,在烟囱1底部推动风力透平12转动,并由发电机发出电能。此时空气仍为强大的上升气流,经过腔体式吸热器4后密度进一步降低进而流动速度进一步提升,而后流过冷凝器2,湿空气内水分冷凝为淡水并滴落进入淡水收集器3。新鲜盐水则首先注入冷凝器2,而后流入盐水池8,并在两者之间循环。
腔体式吸热器4的腔道内布置有导热盘管5,导热盘管5与盐水池8相连,导热盘管5内有流动盐水,流动盐水在导热盘管5与蓄热层内不断循环,将热量由导热盘管5带入盐水池8内,从而提高空气温度以及盐水池8内盐水温度,促进盐水蒸发以及气流流动。
盐水池8内浓度达到盐的最大溶解度后即会在池底析出盐晶体;同时,在昼夜温差作用下盐的溶解度也不同,也会在夜晚温度较低时在盐水池8底析出盐晶体。定日镜位于集热棚边缘,按照当地地理位置计算不同的定日镜追日倾角,布置的个数由所需的聚光比决定。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变形,这些改进和变形也应视为本发明的保护范围。
Claims (4)
1.一种追日太阳能烟囱盐、水、电联产系统,其特征是,包括集热棚、设置在所述集热棚中心的太阳能烟囱和设置在所述集热棚与烟囱结合处的风力发电机;所述集热棚边缘设置有若干个定日镜;所述集热棚包括集热棚盖板、集热棚支撑、蓄热层和盐水池;所述烟囱内从上而下依次设置有冷凝器、淡水收集器、腔体式吸热器和风力透平;所述腔体式吸热器内设置有导热盘管;所述定日镜采用两维跟踪太阳方式,每一面定日镜镜面的倾角均不相同;所有的所述定日镜组成境场将太阳光线汇聚到所述腔体式吸热器中;所述聚光区域为设置在烟囱侧面开口内的内腔式吸热器;所述集热棚支撑用于支撑集热棚盖板的重量;所述集热棚盖板与蓄热层、盐水池之间形成空气流道;所述集热棚两侧设置有空气入口;所述冷凝器的分布形式采用中心高周边低;所述导热盘管连接有输水管;所述输水管与盐水池相连接;所述导热盘管内流有蓄热池内的盐水。
2.一种利用权利要求1所述的追日太阳能烟囱盐、水、电联产系统的追日太阳能烟囱盐、水、电联产系统运行方法,其特征是,空气由所述集热棚两端的空气入口进入系统后流过蓄热层、盐水池、风力透平、腔体式吸热器、淡水收集器后在冷凝器处凝结为淡水,淡水由淡水收集器收集。
3.根据权利要求2所述的一种追日太阳能烟囱盐、水、电联产系统运行方法,其特征是,所述定日镜将太阳光聚集到腔体式吸热器内,加热空气流以及导热盘管内的盐水;所述导热盘管内的工质通过输水管流动到盐水池内加热空气和盐水池内的盐水,而后通过输水管回到导热盘管内,以此循环。
4.根据权利要求3所述的一种追日太阳能烟囱盐、水、电联产系统运行方法,其特征是,空气流推动所述风力透平发电,发出电能经过逆变器后储存在蓄电池内,所述蓄电池内的电源用于驱动导热盘管内的工质做功,富余电能存储在蓄电池内留作无太阳时候使用。
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